Gorsuch was confirmed in 2017, the first of three appointments under Donald Trump which tilted the court firmly right.
He has since voted with conservative majorities in decisions including the removal of the federal right to abortion and a loosening of gun control laws.
The chief executive who bought property from Gorsuch, Brian Duffy of Greenberg Traurig, told Politico, he had “never spoken” to Gorsuch.
Politico said Duffy’s firm had been involved in “at least 22 cases before or presented to the court”, including filing amicus briefs or representing parties, while Gorsuch was on the court.
Gorsuch, Politico said, “did not respond to inquiries about the [property] sale, his disclosures or whether he should have reported Duffy’s identity as the purchaser”.
“The need for supreme court ethics reform is clear, and if the court does not take adequate action, Congress must.”.
Kyle Herrig, president of the watchdog Accountable.US, said: “Without decisive action, the conservatives on the supreme court will forever tarnish its reputation in our public life. »